Richard Tarnas's Cosmos and Psyche was published in January 2006. This book was published within a year after the discovery of Eris and within a year before the naming of that so-called "dwarf" planet. (As Vattel once said, "A dwarf is just as much a man as is a giant.") Perhaps the publication of Tarnas's book can be considered as a synchronistic event correlating with the emergence of the Eris archetype into the collective consciousness.

However, Tarnas's book understandably fails to mention the newly-discovered planet.

Uranus/Eris hard aspects (including the conjunction, which is going on right now) correlate consistently with periods of social unrest. The last Uranus/Eris conjunction saw global outcry against the perceived judicial murder in the USA of a pair of anarchists (see https://en.wikipedia.org/wiki/Sacco_and_Vanzetti), while in China the Shanghai Massacre led to the revolt of the nation's Communists, who of course eventually took over the whole country two decades later.

The Uranus/Eris opposition in 1970/71 saw the cresting tide of the anti-war movement -- "Four dead in Ohio" and its aftermath.

The Uranus/Eris square in 1991/2 saw the demise of the Soviet Union after a popular uprising against an attempted military coup, together with the Clarence Thomas/Anita Hill outrage and the Rodney King riots.

And then there's the Pluto/Eris cycle:
The 1756/7 Pluto/Eris conjunction (which squared Uranus) saw the diplomatic revolution of 1756/7, as ongoing conflict between Great Britain and France morphed into the Seven Years’ War. During this period Austria went from being a British to a French ally, as Austria’s enemy Prussia replaced Austria as a British ally. See https://en.wikipedia.org/wiki/Diplomatic_Revolution

The Pluto/Eris square of 1906-11 saw a geopolitical realignment setting the stage for World War I, featuring the formation of the Triple Entente between England, France and Russia (1907) as Austria-Hungary’s annexation of Bosnia (1908) embittered relations with Russia.

The Pluto/Eris opposition of 1976-78 saw an extended period of diplomatic maneuvering that finally led to the Camp David accords (Sept. 1978), paving the way for a peace treaty the following year between Egypt and Israel.

The Pluto/Eris opposition aligned with both the Nodes of the Moon and the Midheaven/I.C. axis in the horoscope for the 1977 discovery of Chiron(!)

This opposition also saw the rehabilitation (1976) and rise to power (1977) of Deng Xiaoping in China, who then (1978) reversed the disastrous Maoist economic policies, beginning the process of China’s rise to the status of a Great Power. This leads naturally to the supposition of further geopolitical realignment centered on China at the Pluto/Eris square around 2020.

I'm going to end this post with my own intimations of a new world view: The collective purpose of humanity involves participating in the ongoing creation of the universe. This requires social organization that fosters the development of our natural but latent inclination to act for the well-being of our fellow humans, together with ongoing scientific discovery and technological progress, which is necessary to avoid setting people at each other's throats in a world of resource depletion and ecological holocaust.

Venus and Mars are currently rolling over the natal Eris of literally billions of people, so to revisit that classic Eris myth, Pandora’s Box: It seems to me that Pandora’s Box served the patriarchy in ancient Greece just like the myth of the temptation of Eve served the patriarchy in ancient Israel.